In Sicily, a wedding photographer was fatally shot when he had the bride and groom pose with hunting rifles. It is not known whether the shot happened while the couple was posing or when the rifle was being handed back to the photog.
I know several people who were packing when they got married, and one of them was even the groom. If you have guns at your wedding, well, I'm all for that, but you should only be handling guns at your wedding if you would normally be handling guns at other times of your life. Guns are not props or toys that know you don't mean to hurt someone. The gun is a tool. The idiot wielding the gun is the wild card element.
Further, someone who knew something about guns should had been overseeing the handling of the guns and should have checked repeatedly to ensure there were no rounds in the firearms. This was a fail on several levels, but mostly it's just a sad story that will be used to emphasize wrong points, I expect.
It's funny, though, when people want to snap a memorable photograph, you never hear of people deciding to juggle chain saws for the first time or posing up close and personal with alligators. Hmph.